1264105161 has 12 divisors (see below), whose sum is σ = 1991923440. Its totient is φ = 766124280.

The previous prime is 1264105151. The next prime is 1264105163. The reversal of 1264105161 is 1615014621.

1264105161 is a `hidden beast` number, since 1 + 2 + 641 + 0 + 5 + 16 + 1 = 666.

It is not a de Polignac number, because 1264105161 - 2⁶ = 1264105097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264105163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6384271 + ... + 6384468.

It is an arithmetic number, because the mean of its divisors is an integer number (165993620).

Almost surely, 2^1264105161 is an apocalyptic number.

1264105161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1264105161 is a deficient number, since it is larger than the sum of its proper divisors (727818279).

1264105161 is a wasteful number, since it uses less digits than its factorization.

1264105161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12768756 (or 12768753 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1264105161 is about 35554.2565806121. The cubic root of 1264105161 is about 1081.2540191816.

Adding to 1264105161 its reverse (1615014621), we get a palindrome (2879119782).

The spelling of 1264105161 in words is "one billion, two hundred sixty-four million, one hundred five thousand, one hundred sixty-one".